In the UK can you use a VAT flat rate construction scheme under the VAT reverse charge construction scheme ?
Sorry @Jcollins but the forum is for support to the Manager accounting application not generic accounting questions for which solutions should be sought elsewhere. In your case for example asking a UK accountant what to do.
The how to do it in Manager would be a valid question but only after you have given it an attempt and show through screenshots what you did and where things may have been unexpected.
As a new user to the forum I would strongly recommend that you read the guidelines at FAQ - Manager Forum