In the US, QuickBooks is probably the most frequently used accounting software available. It is relatively user-friendly, but it helps if you are familiar with basic accounting procedures. There are both an online and desktop version available. I prefer the desktop version as it has more extended functionality than the online version, and is a one-time payment rather than a monthly subscription. Other folks like the freedom of accessing their QB online from anywhere. The desktop version can be accessed remotely through various software options. You will find various pro and con opinions in this forum section, as well as ways to remotely access this, as well as other software.