The government has recently made it much easier for those working from home to claim tax relief worth up to £125 to help cover the extra costs of things such as stationery and some household bills.
Current coronavirus advice across all UK nations is for people to work from home where possible, with many employees seeing some outgoings increase as a result.
Here, Which? explains how to claim the tax rebate, how to get further financial help to heat your home and how working from home could affect your home insurance.
The government's eligibility tool will check all of these facts. To proceed, you must have a Government Gateway user ID and password - but if you don't already have one it will guide you to the right place to create one.
For the next step, you simply state what date you started working from home. You'll receive a rebate for the full year even if you don't know when you'll be going back to the office and even if you've only had to work from home for one day.
If your claim is successful, your PAYE tax code will be changed, which means you'll be able to earn more before tax payments kick in. If you started working from home before 6 April 2020, this will take into account any tax relief owed for the 2019-20 tax year as well.
Tax relief for the full tax year will be worth either £60 or £125, depending on the rate of income tax you pay.
You can claim tax relief on £6 a week; if you pay the 20% basic-rate income tax that will mean a gain of £1.20 a week (20% of £6) or £60 a year.
If you're a higher-rate taxpayer, the tax relief you receive will equate to a gain of £2.40 a week (40% of £6) or £125 a year.
If your employer chooses to give you the working from home allowance, this would be £6 a week tax-free.
If the £6-a-week tax rebate doesn't cover your extra costs, it's possible to claim for more - but you'll have to provide evidence of having higher bills and other outgoings as a result of having to work from home.
Employed workers can only claim tax relief for things that are solely used for work purposes.
This includes things such as extra costs for gas and electricity used to power your work area or the costs of business calls added to your phone bill.
When it comes to things such as rent or broadband, you can't claim for these - nor can anything else that's used for both private and business use.
Self-employed people working from home can claim for more costs than employed workers. This includes a proportion of the costs for lighting, heating, cleaning, insurance, mortgage interest, council tax, water rates and general maintenance.
To work out this proportion, you'd need to calculate the amount of time you're using your home for work and, in the case of lighting and heating, how much of your home is being used.
As self-employed workers are taxed on their profits, expenses incurred from working from home can be deducted, therefore reducing the amount of tax you'll pay.
You can call on 0800 024 1222 - lines are open from 8am to 4pm Monday to Friday.
There's also a webchat service for those who are struggling to pay their taxes.
Working from home all day during the colder months can mean using more energy than usual, which in turn will mean higher bills.
If you need extra help, there are a number of government grants you may be eligible for. The five main ones are:
Home insurance cover for office-based employees who have been forced to work from home due to coronavirus won't be affected, according to the Association of British Insurers (ABI).
This means it's not necessary to contact your insurer to extend your cover or update your documents to say you're working from home.
Before the pandemic, someone setting up an office in their home may have needed to tell their home insurer about the change and might have had to pay for extended cover for additional items.