# Opti.Tax System Requirements

**Opti.**Tax

## System requirements

## System requirements for Opti.Tax

### Windows client PC \(single-user and multi-user\)
- **Windows 10/11**\(64-bit\)
- 4 GB \(recommended\) or more of free RAM, at least 2 GB
- 2 GB of free hard disk space
- 1920 × 1080 \(recommended\) or higher resolution, at least 1280 × 1024
- In single-user mode, the built-in H2 database can be used

### Database server:
- approx. 1 MB of database storage per project, more if there are additional attachments,
Transfer protocols, footnotes, assignments, S\+E projects, property tax, etc.
- MS SQL Server 2017 \(Express, Standard, Enterprise\) or later
- *It is possible to use other database systems; please do get in touch with us about this.*

### Terminal Server / Citrix:
- Windows Server 2016 RDP or later
- 2 GB of free hard disk space