If I adopt the presumptive taxation scheme of section 44AE, then am I liable to pay advance tax in respect of income from business covered under section 44AE?

If I adopt the presumptive taxation scheme of section 44AE, then am I liable to pay advance tax in respect of income from business covered under section 44AE?

Yes. In case of PTS for transporters, advance tax needs to be paid in all quarters and not only in last quarter unlike the PTS for section 44AD and 44ADA.