Free deduction scan

Start the deduction scan.

Sourdough checks 1099 expenses against federal and state deduction rules, then shows the math before you file.

Deduction packet Read-only bank connection through Plaid. Federal and state rules checked line by line. $0 scan. No credit card.
Step 1 of 4

Free scan

Where should we send your results?

Free national deduction scan for 1099 income. Start here, pay only if you later choose to file.

We send your results here and hold your place in the scan flow. No spam.

A few quick things

State and mileage.

Free deduction scan and signup are open nationwide. Filing options come after the scan.

Usually the biggest write-off, and the one your bank can\'t see. Not sure? Most full-time drivers log 20,000 to 40,000. Leave it blank if you have no idea.

Last step

Connect read-only bank data.

We read two years of transactions to find deductions. About a minute.

  • Plaid — the same secure link your banking apps use.
  • Read-only. We can never move your money.
  • Your password is never shared with us.

Sample scan uses generated 1099 data through Plaid sandbox. Bank connect test mode accepts user_good / pass_good, code 1234 if asked.

Working

Scanning two years.

Securely reading your last two years…

This usually takes about a minute. Keep this tab open.

Deductions found

$0

Year Found money Total tax
Open full report

Sourdough keeps the deductions, rules, and filing path together in one report.