THE national legislature has urged the central Government to solve the chronic problem of deficits in three years in order to avoid jeopardising the economy. The Financial and Economic Committee of the National People's Congress said the increasing deficits of the treasury would seriously jeopardise the national economy. ''We must have the determination to increase revenue and cut down expenditure to solve the deficit problem in three years or a slightly longer period.'' The committee's report was based on views expressed by NPC delegates on Finance Minister Mr Liu Zhongli's provisional 1993 budget tabled at the plenum. According to Mr Liu's report, the budget deficit for last year was 23.75 billion yuan (about HK$32 billion), compared with 21.11 billion yuan for 1991. Maintaining that the financial situation of the state remained difficult, the committee proposed a series of measures to help reduce deficits. The committee urged local authorities to stick to the principle of a balanced budget, adding ''no deficits should occur in the process of implementation''. The State Council should take effective measures to strictly control the budget implementation and try to reduce the deficit earlier than forecasted, it said. The committee called on the relevant departments under the State Council to accelerate the drafting of laws concerning taxation and budgets. A set of laws on budgets should be tabled to the NPC Standing Committee for study this year so it could be forwarded for approval at next year's plenary session. The committee said the Government should take measures to ensure laws on taxation were strictly enforced and publicised so the public was aware of the significance of their duties to pay tax.