You've entered the income statement, the balance sheet ties, the K-1 looks right, and then you hit calculate and Drake hands you a list of diagnostics. On a first-year S corp it's usually the same handful, and a few of them are worded in a way that doesn't obviously tell you what to do.
Here's what the common ones mean and where to go.
"S corp election effective date occurs after the start of the tax year"
This one sounds alarming and is completely routine. It means the S election took effect partway through the year, which is normal for a business that was formed mid-year.
Say the entity was incorporated on November 12 and elected S treatment from that date. The return is not covering January through December. It's covering November 12 through December 31, which is a short year.
The fix is to go back to the general information screen and enter the fiscal year begin and end dates rather than leaving the default calendar year. Once the begin date matches the election date, the diagnostic clears.
It's worth understanding rather than just clearing, because a short year affects more than a date field. Any annualization, and the beginning balances on Schedule L, follow from it.
"Prior year net income" or a similar prior-year field
On a first year there is no prior year, and Drake still wants the field answered.
Enter zero. It's on the AAA screen, which is where the accumulated adjustments account lives. Leaving it blank isn't the same as entering zero as far as the diagnostic is concerned.
The Schedule K-2 and K-3 diagnostic
This is the one that sends people in circles, because the message tells you to go to the credits tab and it isn't obvious which credits tab it means.
Schedules K-2 and K-3 deal with items of international relevance. Most small domestic S corps have none, and there's a checkbox to say so. It sits under the shareholder pro rata share section, on the credits tab, and checking it clears the diagnostic.
The path is Schedule K, then shareholder pro rata share items, then credits. If you go hunting through the top-level menu for something called "credits" you'll be looking for a while.
Don't check the box reflexively though. If the corporation does have foreign income, foreign taxes paid, or foreign partners, K-2 and K-3 are genuinely required, and the shareholders need K-3 for their own returns.
Method of accounting
Cash or accrual, and it has to be answered on the general information screen. For most small first-year S corps it's cash, but check with the client rather than assuming, especially if they carry inventory or meaningful receivables.
Missing shareholder details
Address, resident state, ownership percentage, and time devoted to the business all live on the officer and shareholder screens, and each missing one produces its own diagnostic. Worth filling them all in at once when you first set up the shareholder rather than clearing them one at a time later.
Ownership percentage is the one that actually matters for the numbers. The rest are informational, but they'll block an e-file just the same.
Attaching Form 2553
Not always a diagnostic, but do it anyway on a first-year return. Attach the S election as a PDF to the e-filed return. If the IRS has no record of the election, and that happens, having it attached from the beginning saves a correspondence cycle later.
The general approach
Diagnostics in Drake come in two flavors, and it helps to sort them as you go. Some are missing data, meaning fill in the field. Others are telling you something is inconsistent, and those deserve a second look before you clear them.
The election date one is a good example. You could technically make it go away by changing the election date to January 1, and the diagnostic would clear, and the return would be wrong. Read what it's telling you before deciding how to satisfy it.
You can work them from the diagnostics list itself or by clicking calculate and reviewing what comes up. Either way, clear them all before you get to e-file selection, because the critical ones will stop the transmission anyway.
What doesn't show up as a diagnostic
Worth saying plainly: diagnostics check the return for internal consistency and completeness. They don't check whether the numbers are right.
Nothing will flag officer compensation sitting in salaries and wages. Nothing will flag meals deducted at 100 percent. Nothing will flag a missing depreciation entry, or distributions coded to an expense account, or a beginning balance that doesn't match last year's ending balance. The return will calculate, pass every diagnostic, and e-file successfully with all of those errors in it.
That's the gap worth having a process for, and it's why the reconciliation happens before the tax software rather than inside it.
Closing the gap before you open Drake
Ledger IQ works on the trial balance side of that line. You upload what the client sent, map each account to an actual return line, post the adjusting entries the books are missing, and record book to tax items as tax journal entries with their own M-1 and M-2 offsets so the book column stays intact.
The Working Trial Balance proves the arithmetic as you go: every column foots, and the income proof walks from net income per books through the book to tax differences and separately stated items to ordinary business income, which is what page 1 should say and what Box 1 on the K-1 should say.
The Return Tie-Out then compares each mapped line against the return as filed, which catches the class of problem no diagnostic will: a line that computes fine and is simply wrong.
Catching what diagnostics cannot, before you open Drake
- Upload the trial balance and map every account to a real line on the 1120S.
- Post the adjusting entries the books are missing, each with a reference, so the adjustments column shows what changed and why.
- Record book to tax items as tax journal entries with their own M-1 and M-2 offsets, which keeps the book column true to the client financial statements.
- Read the Working Trial Balance across. Unadjusted, adjustments, adjusted, tax adjustments and tax balance, with totals proving every column foots.
- Check the income proof. If net income per books does not walk to ordinary business income, something is wrong now rather than after e-file.
- Use the Return Tie-Out to compare each mapped line against the return as filed. That is the check for a line that computes fine and is simply wrong, which is exactly the class of error no diagnostic raises.
- Export to Drake, then work the diagnostics knowing they are the only thing left to clear.
Supports Forms 1065, 1120S and 1120, with exports for Drake, Lacerte and UltraTax CS. The walkthrough is in the Drake Tax resource guide, and it is free during early access, so you can start at portal.ledgeriq.ai and run this on a live client without a credit card.