While entering vouchers, you can mark them as post dated. Tally will not update the vouchers in ledgers until the specified date is approached. This is useful to enter transactions that take place on a regular basis. For example, if you pay for something by installments, you can set up the payments in advance, and Tally will only enter them in the ledgers as they fall due.
Mark vouchers Post Dated by using CTRL + T or click on Post dated button from the Button Bar. This button toggles with Current.