You do not have to "close" it. If you have decided not to use the TT account, just clear it out and abandon it.
https://ttlc.intuit.com/questions/2586254-how-do-i-clear-and-start-over
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
