You can add postage to your USPS account through the SendPro Online Mobile App.
- On the Home screen, tap Funding.
- To add one of the preset amounts, tap on it.
- To add a different amount, tap Custom and enter the amount on the line.
- (Optional) To assign this postage purchase to a cost account, tap the Cost Account menu and select the account.
- Tap Add Postage.
UPDATED: December 15, 2020