A Streamlined Sales Tax ID (SSTID) is issued when you submit your registration through the SSTRS. That number is a 9-character ID starting with a "S." You may use your SSTID for communications with Streamlined and all Streamlined Member States.
A state may use the SSTID for filing of returns, however, most states will provide you a state issued number to use. Each state should let you know your reporting requirements.
If you contracted with a CSP, the CSP will file the sales tax returns and remit the sales tax for you each month to each Streamlined states you are registered in through the SSTRS.
2. Filing your returns
If you did not contract with a CSP, you are responsible for filing the sales tax returns with each state using their online filing systems. The state’s registration letter will have information as to how frequent you will need to file the returns.
States will expect you to file returns each reporting period even if you have no tax to report.
Some states may have you file as needed or on a "casual" filing basis. That means you file when you have sales.
If you registered prior to February 11, 2019, and you indicated you did not have sales in a state when you registered, but you now have sales, contact that state to have them set your account up to accept returns. You are registered in the state and will not be required to re-register.
Do not ignore notices from a state. If you do not understand why you received a notice, contact the state as soon as possible to discuss.
Contact the state to set up your account for reporting. If you registered prior to 2/11/2019, you were automatically registered in all Streamlined Full Member States when you registered. You will not need to re-register for that state.
You cannot change the indicator for "Has Sales" after you register.
There are no fees or other charges to register in a state in which you have no legal requirement to register. Some states may charge a fee if you have a legal requirement to register. If those states require a fee, they will contact you.
States may require additional information if you have a legal obligation to collect a state’s sales tax if you are not already registered in that state. If a state needs additional information, they will contact you.