where can i find this [ ] on a microsoft laptop

On a typical English Windows laptop keyboard, the square-bracket keys [ and ] are immediately to the right of the P key.

• Press [ for an opening square bracket.
• Press ] for a closing square bracket.
• You normally do not need to hold Shift.

If those keys produce different characters

Your active keyboard layout may not match the labels on the keyboard. Press Windows key + Spacebar to cycle through installed layouts and select the appropriate English layout. Keyboard layouts can map punctuation keys differently.^1^

Use the Windows 10 On-Screen Keyboard

If the physical keys are missing or unclear:

1. Open Start → Settings → Ease of Access → Keyboard.
2. Turn on Use the On-Screen Keyboard.
3. If it displays only navigation controls, select General for the full keyboard.
4. Click [ or ] with the mouse. The On-Screen Keyboard works without a touchscreen.^2^

References

1. get question mark and keyboard to work - Microsoft Q&A
2. Windows 10