Get Your Books Ready for Tax Season with Muin

Muin organizes your records. It is not tax advice and does not prepare or file returns. Review everything with a tax professional or your filing software before you file.

Many owners reach tax season with a bank account, a shoebox of receipts, and no books. That is common. The work is the same every year: get every transaction in, put each one in the right place, find the receipts, and pull out what is personal.

Tax Season Prep in Muin turns that work into a step list.

Where to find it

Go to Finance > Tax & Compliance > Tax Season Prep. Pick a tax year. From January to April, it opens on last year, since that is the year you are filing.

The page shows a readiness score for that year. Each step has a button that opens the screen where you finish it.

From November to April, the Finance overview also shows a Get ready for taxes card until you are done.

The steps for businesses

Connect your bank. Muin connects through Plaid and pulls up to 24 months of history, so a late start still covers the full year.
Fill in missing months. Import CSV, OFX or QFX statements for any gap. Rows already in your books are skipped, so overlapping files are safe.
Categorize transactions. AI suggests a category and the line on your return it maps to, and says why. You approve or change each one.
Attach receipts. Muin flags expenses of $75 or more, the receipt threshold in IRS Publication 463. Email receipts to your Muin inbound address or upload them.
Separate personal spending. Mark personal purchases paid from the business account as owner draws.
Review large purchases. Purchases over $2,500 are listed so you can record them as assets.
Home office and vehicle. Sole owners enter home office square footage. Business miles are totaled from approved expenses.
Upload tax forms you received. Add 1099-K forms, other 1099s and last year’s return.
Collect W-9s from contractors. Get a W-9 from each contractor you paid.

The steps for nonprofits

Nonprofits that file Form 990 skip the personal spending step and get three others:

Split expenses by purpose: program, management and general, and fundraising.
Complete large donor records: donors who gave $5,000 or more, for Schedule B.
Start your Form 990 workspace.

The tax package

When the steps are done, select Download tax package. You get a ZIP file with:

Totals by tax-form line, as CSV and as PDF in form order: Schedule C, Form 1120-S, Form 1065, Form 1120, or Form 990 Parts VIII and IX.
An Unmapped section for anything not yet tied to a line.
Receipts still needed.
Large purchases.
Owner and personal items.
Assets placed in service.
Contractors who may need a 1099.
Tax year details.

Send the package to your CPA. If you file yourself in TurboTax Business, use the line totals to enter each amount. Muin does not produce a TXF import file.

Muin Tax Ready

Tax Season Prep is part of Muin Tax Ready, which you can buy without the rest of Finance. The readiness score is free. The year’s inputs and the tax package are the paid part.

During the year

Sole owners see quarterly estimated tax reminders for Form 1040-ES on the compliance calendar: April 15, June 15, September 15 and January 15.

You can also ask Muin how ready your books are. Ask Muin reports your readiness and your next step.

What Muin does not do

Muin does not compute your tax. It does not decide what is deductible. It does not prepare or file returns. Every number in the package comes from your own records, and your preparer makes the final call.

Muin organizes your records. It is not tax advice and does not prepare or file returns. Review everything with a tax professional or your filing software before you file.