Yes, the estimate/invoice numbering system can be modified to begin at a designated number to align with your previous invoicing system.
To change the starting number, click 'Company Settings' in the lefthand menu, then click on the 'Estimates & Invoices' sub-header, make sure you are on the 'General' tab, click on the 'Next Estimate/Invoice #' line and type in the number you'd like your estimates and invoices to start at, and finally click 'Save'.
If you need any help please email us at support@fieldpulse.com or live chat with us using the blue button in the bottom right corner.