Done with filing your TDS return? Good, now save your Acknowlegement Number (Provisional Receipt Number) on TaxCloud itself. You may need to refer to this 15-digit acknowledgement number in the future, in order to prepare a correction statement or to download your Form-16s.
TaxCloud keeps it safe so you do not need to worry about losing it in the future.
Once you enter your acknowledgement number, your TDS return is made uneditable (Locked) in order to prevent any accidental modifications of your data.