Regarding Tax in invoice

Hi SAP Experts,

I am using partial invoicing plan in case of procurement of Turnkey projects, and configured for manual invoice creations, now when i define the invoicing plan based on Value, the system does not take the Tax amount in the invoicing plan amount & also at the time of invoice creation in MIRO, system is not taking the tax.

Is there any configuration issue.

Regards

Pankaj Verma