With fiscal math under pressure due to lower buoyancy in tax collection, the government is eyeing advance tax payment to meet the revised Budget target of Rs 12 lakh crore for the current fiscal. According to sources, efforts are being made to make up for the shortfall in direct tax collection, but the revised target seems to be daunting. The government had earlier estimated Rs 11.5 lakh crore mop-up from direct tax collection. The increase of Rs 50,000 crore in the interim Budget 2019-20 has made the task of achieving the revised target a difficult proposition for the Central Board of Direct Taxes (CBDT), sources said adding the shortfall seems to be imminent.