Hello andreij,
Glad to have you post in the QuickBooks Community. I'll be glad to share more info and help steer you in the right direction.
When using QuickBooks, if you decide to make a change such as the one you've described, it will take effect of entries you create going forward. That being said, I'd like for you to have a resolution that best suits your needs and I recommend getting in touch with the QuickBooks Time support team to verify the best resolution. You can get in touch with the team using this link here.
You're more than welcome to keep me posted on how you make out. I'll be one message away in case you need anything else.
