The “Micro, Small and Medium Enterprise (MSME)” sector of India is considered as one of the major contributors of GDP in our country by the enormous industrial activates throughout the nation. With the implementation of the 'Digital India' initiative by the Government of India, digital payments are getting popular among these business enterprises throughout the country. In the case of digital payments, Mobile payments play a vital role in the digital transaction with the help of UPI (Unified Payment Interface) particularly after the COVID-19 pandemic outbreak in India. According to the National Payments Corporation of India (NPCL), UPI saw transactions worth Rs.4.9 trillion and another digital payment platform Immediate Payment Service (IMPS) saw a 15% increase in the volume of transactions to 349.76 million in July over June 2021. There are plenty of studies were available on mobile payment in various sectors. But there are few studies were discussed the mobile payment adoption by the entrepreneurs of MSMEs, especially after the COVID-19 scenario. This study dealt with mobile payment technology adoption in India using the extended UTAUT model with the variables like social influence, perceived susceptibility, perceived trust, Relative advantage, Perceived compatibility and Habit which affects the mobile payment adoption intention in Post COVID-19 scenario. The “partial least squares-structural equation modelling (PLS-SEM)” approach is used to validate the suggested model. The results of this study aid in a better understanding of the factors that drive mobile payment adoption in Tamil Nadu and other states.