VAT Theshold

Hi

I have a client who is VAT Registered and the turnover is 70200. It has gone up by 8000 from last year and they expect it to increase this year.

What happens if they reach the 85000 on the 3/4 VAT Return and need to register for MTD? Do they need further software as theirs isn't MTD Compliant and will they then need to use 2 softwares for the year end accounts?

Thanks

Sam