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How-to guide · Getting ready to file

Tax documents checklist for the 2027 filing season (2026 returns)

Several forms look different for 2026 returns, and a few new deductions depend on records nobody mails you. Build your list in November or December, then check items off as they arrive.

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Related: Trial balance explained · Owner contribution or loan · Closing entries and retained earnings

Free tools: True cost of an employee · Contractor vs employee cost

Keeping your own books? Tallyfinch does invoices, bank import and reports on your computer. See Tallyfinch

Everything for your preparer in one place

Tax Document Organizer

An income documents checklist with who sends each form, a deductions and credits records list, a ten-folder system for paper or the cloud, twenty yes-or-no questions about what changed this year, and key dates for 2027.

See the Tax Document Organizer ($19)Business owners: year-end close and 1099 kit ($29)

Not tax advice. This guide explains published rules and how to organize your own records. It does not tell you what you qualify for or what to file: your forms, the official instructions and your tax preparer decide that. MCC Solutions is not a CPA firm and is not affiliated with the IRS or the State of New Jersey. Examples use made-up numbers. Checked November 2026.

New Jersey deadlines and rule changes, by email

A short email when a deadline is coming up, a rule changes or we add a free tool. A few a month at most, and you can unsubscribe any time.

Tallyfinch

Books you keep on your own computer

Tallyfinch does invoices, bills, bank import, reconciliation and the main reports, in a file you own. $99 once, then $5 a month for updates; the app keeps working if you stop the plan. It does not do payroll or sales tax filing. The free download records up to 60 entries.

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