Hi,
Both domestic and import process are same and the difference is the duties, kindly follow the below steps.
1. Create new document type for Import procurement and number range for easy identification.
2. Keep two different pricing procedure for import and domestic along with schema.
3. Keep condition type for CVD, Customs, CESS and others.
4. Do MIRO for Customs duty and MIGO after stock reached you.
5. Do excise availment and do MIRO for vendor.
Hope it is clear...
Regards,
Karna J