Hi,

If you already installed the US check layout module you have to go to Accounting > Configuration > Settings, scroll down to the Vendor Payments section and set the check layout and save.

If you country in company is not US, in Odoo 13 Enterprise,  Odoo introduce a config parameter named account_check_printing_force_us_format to force the use of the US layout (it thus still requires l10n_cus_check_printing to be installed).

To add this  config parameter:

Enable developer mode and then go to Settings -> Technical -> System Parameter and click on create button:

In Key field put : account_check_printing_force_us_format

In Value field put: True

Then save.