Hello @kpersaud,

As of the moment, there isn't an integrated way to automatically fill in your customer's company name as the subject line when sending your sales forms to them. And we're unable to provide the turn around time as to when it'll be automated in the system.

That being said, you can consider reading through our blog site for the new updates rolled out in the system: QuickBooks Online Blog.

Additionally, I've also included this helpful article for the troubleshooting steps in case you'll bump into errors when sending your sales forms: Delivery Errors when trying to email a sales form.

If there's anything else that I can help you with, please let me know in the comments below. I'll be here to lend a hand Stay safe!.