Tripartite agreement is a tax payment agreement established by Party A, Party B and Party C among tax authorities, banks and enterprises. The agreement is made in triplicate, and the tax collection code of the tax authorities needs to be filled in. The tax collection code is different in different places, so you can consult the tax personnel. You should also fill in the basic information such as the information of your company's bank. First, the tax authorities should sign and seal the agreement, then go to the bank to sign the agreement. Finally, send the signed tripartite agreement to the tax authorities and keep a copy and connect it to the tax system.