Integration with other system

can we integrate this system to furniture wizard software for sales & inventory purposes ?

Manager does not integrate with any third-party software.
Also, Manager has both sales and inventory management.

Ok… can you please explain about your point of sale system … if there is any trial for that … because if its suitable for our business we are planing an option to buy.

Manager does not have a separate POS system. Many retail users maintain separate POS systems and make daily summary entries to Manager.

you can download the free Desktop edition and try for yourself.

you can read the guides section for better understanding the software.
https://www.manager.io/guides/

Manager is capable of integrating automatically with other systems via the REST API only. To take advantage of this feature, however, you will need to hire a local expert.