To cash in to your Maya e-wallet, start by opening the app and navigating to the 'Cash In' section. You can choose from various options such as bank transfer, over-the-counter cash-in at partner locations, or through remittance services. If you opt for over-the-counter, simply present your cash and provide your registered mobile number to the teller. Make sure to check for any fees associated with each method. For detailed guidance, visit the official Maya website or consult their customer support.