Hello Rajiv,
Check following:
1. Check country code GB in your plant in t.code:OX10 and check did you entered same plant code in purchase order
2. Find tax condition type for Tax code XX and check did that tax condition type available in following path where tax condition type represent which sort of tax:
SPRO -- > Logistics general -- > tax on Goods Movements -- >India -- > Basic setting -- > Determination of Excise Duty -- > Condition-Based Excise Determination -- > Classify Condition Types
3. Also cross check country code GB in your tax procedure, tax code and company code.
4. Check J1ID for tax master data and tax code assigned to company code in following path:
SPRO -- > Logistics general -- > tax on Goods Movements -- >India -- > Basic setting -- > Determination of Excise Duty -- > Condition-Based Excise Determination -- > Assign Tax code to Company Codes
Regards,
Thanga