Adding additional costs to a fixed assess

I am building a new warehouse. I added it to fixed costs. However I will be adding additional costs as I go. But payments/receipts won’t let me assign new receipts to this fixed item. How do you add additional costs to a fixed item?

You are mistaken. Payments can be allocated to Fixed assets and the specific asset’s subaccount. See Perhaps you created an account for this asset yourself instead of entering it as a fixed asset in the Fixed Assets tab?