The chancellor will give his economic update to the Commons as the cost of living crisis continues.
The party's spokeswoman, MP Alison Thewliss, said: "The reality is that the chancellor is not going anywhere near far enough to tackle this crisis and to support families.
Speaking to BBC Radio 4's Today programme, he said it was a "tax on jobs" that would hit individuals and businesses the hardest, and it was "likely" Mr Sunak might take action on the threshold for paying it, which would help low-income families. One of the main rumours circling ahead of the Spring Statement is that a cut to fuel duty will go ahead after more than 50 Tory MPs wrote to the chancellor to make the demand.
Co-leader Adrian Ramsay said: "We absolutely know people need help right now - but cuts to fuel duty aren't targeted to support the poorest and the greatest numbers of people." The Conservative Environment Network of Tory MPs is also making its own request, calling on Mr Sunak to cut VAT for energy-saving products and home installation to 5%.
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