Legal analysis: Take the stamp duty purchase and sale contract as an example 1. Login to Anhui Provincial Taxation Bureau in State Taxation Administration of The People's Republic of China, People's Republic of China (PRC). Enter the website of Anhui Electronic Taxation Bureau in State Taxation Administration of The People's Republic of China, China through the browser. After entering "Anhui Electronic Taxation Bureau of State Taxation Administration of The People's Republic of China, People's Republic of China (PRC)", click "Login" and scan the code to log in to the electronic taxation bureau. 2. Enter the business processing interface. Click "I want to pay tax" →→→→→ Tax declaration and payment →→ Consolidated tax declaration of property and behavior tax →→→ Stamp duty →→ Tax source collection. 3. Enter the declaration interface and fill in the information declaration. Enter the stamp tax source information report page, click Add, select Tax Period, re-extract the confirmation information, and enter the tax amount and number. 4. After saving, click "declare" to return to the declaration interface, select "belonging period" and click "declare next time" to finish. If taxpayers file tax returns by time, click "Add" in the interface of tax source information declaration, and select tax item, period (note that it is a certain day in the period), date of establishment (receipt) of tax payable vouchers, tax amount or number of pieces, etc. The following operations are the same as filing on schedule.

Legal basis: according to