1. Install the TallyDekho desktop application.
2. Sign in with your Google account and then Authorize.
3. Select the companies from Tally ERP9.

4. Click on Advance Configuration then
    Select Tally.ERP9 is acting as- Both
    Enable ODBC server - yes
    Port - 9000
5. Open TallyDekho desktop app, select company and financial years.
6. Click Start sync