Self assessment year end preparation

Self assessment preparation and submission for husband and wife, one is full time employee the other is part-time employee. Both are basic rate taxpayers.
We have two houses which we let out.
Wife has shares in Santander and 3i.
Additionally, advanced knowledge of tax law is required in order to minimise any tax paid.
Last years tax return will be supplied if required along with all receipts for the tax year and any additional information as needed.