Is anyone experiencing problems with VAT filer/ taxes screen in Quickbooks/ Screen flashing from black to grey and none responsive. I m working on a Android Tablet.

Hello STA2018, 

Welcome to the Community page, 

Is VAT filer a 3rd party app or are you just referring to the VAT page in QBO? Are you using the mobile app? Have you tried any other browsers or devices? What other troubleshooting have you tried? For example if on the web have you cleared your cache and cookies or tried a private/incognito window?