Posting in Real Estate without VAT

Hello,

I need to post expenses in Real Estate without a tax code. Not just without the tax line item, but without any tax code in the other line items.

I tried creating a tax type, a tax group and leaving field MWSKZ empty in tables TIVEXFITAXMAP and TIVEXTAXCODEMAP, but then I get error message "RETMFI065 - Data for sales tax is inconsistent" in RECN when assigning the tax type.

Have reviewed all custo but dont know if such posting is allowed.

Would appreciate any help! thank you!

Lucía